What is this "Friends" option that I see on the web site?

What is this "Friends" option that I see on the web site?

A.6. The web site enables you not only to search out your old buddies from the days in uniform but also become friends with them once again on the portal of the AFA website. Select your friends from the list of members and then send them an e mail. Once your request is accepted by your chosen friend you will be able to chat with him in real time. When you are logged in you will be able to see your friends if they too are logged in. Quite like a messenger.